Display module and manufacturing method thereof

ABSTRACT

A display module includes a first housing, a second housing, a display panel, and a glue. The first housing is disposed on the second housing and has a metal sidewall. A first gap exists between the metal sidewall and a sidewall of the first housing. The display panel is disposed on the first housing and has a side surface facing the sidewall, wherein a second gap exists between the side surface and the inner surface. The glue fills the second gap. A manufacturing method of the display module includes disposing the second housing on the first housing and forming the first gap; providing the glue on the inner face of the sidewall and above the first gap; making the display panel push and graze the glue; disposing the display panel on the first housing and forming the second gap, wherein the glue fills the second gap.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a display module and amanufacturing method thereof.

2. Description of the Prior Art

Display module is extensively used in a variety of display devices,wherein the up-to-date display devices such as smart phones or portableinternet devices greatly have the touch interface instead of theconventional keys. To cope with the increasing popularity of touchinterface, the display area of the display panel becomes larger andlarger and the slim frame design is accordingly developed.

The conventional display module 1′ as shown in FIG. 1A includes a framebody 2′, a backlight module 3′, and a display panel 4′, wherein thebacklight module 3′ is disposed in the frame body 2′; the display panel4′ is disposed on the frame body 2′ and is fixed thereto by a doublesided tape 6′ in “□” shape, for example. In addition, the frame body 2′is made of plastic and constitutes the display module 1′ having a widerframe margin. FIG. 1B shows a display module 1 having a narrower framemargin, wherein the display module 1 has a frame body 2 with a podium 23to meet the requirement of a narrower frame margin design. Furthermore,in place of the conventional double sided tape 6′ which has weakerstickiness, glue 6 is used to improve the fixation of the display panel4 and the frame body 2.

However, in order to match up a larger display area 41 of the displaypanel 4 and the narrow margin design, the black frame 45 of the displaypanel 4 becomes smaller and smaller, resulting in a reduced distance Dbetween the edge of the light guide plate and optical films of thebacklight module 3 and the edge of the display area 41. That is, theedge of the light guide plate is closer to the display area 41.Consequently, compared with the display module 1′ with a wider margindesign and a larger black frame 45′ shown in FIG. 1A, the distance D ofthe display module 1 is smaller than the distance D′, causing theleakage of large angle light to occur more easily. That is, light on thelight path “a” or “b” will be received by the viewer as a leaked light.In other words, the thickness of the podium 23 limits the space insidethe frame body 2 and therefore effects the arrangement of the backlightmodule 3, i.e. the light guide plate of the backlight module 3 cannotextend further outward, causing the leakage of large angle light tooccur. Moreover, due to the limitation to the plastic material, thethickness of the frame body 2 cannot be further reduced.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a display modulehaving a slim frame design.

It is another object of the present invention to provide a displaymodule having a well-secured display panel.

It is another object of the present invention to provide a displaymodule having a stronger structural strength.

It is another object of the present invention to provide a displaymodule capable of coping with the light leakage problem.

The present invention provides a display module including a back bezel,a frame body, a backlight module, and a display panel. The back bezelincludes a base plate and a sidewall surrounding a periphery of the baseplate. The frame body is disposed on the back bezel and has a bottom anda metal sidewall surrounding a periphery of the bottom. The metalsidewall extends along an inner surface of the sidewall, wherein a firstgap exists between the metal sidewall and the inner surface of thesidewall for accommodating a portion of a glue. The back bezel and theframe body are both made of metal and together constitute a slim framemargin of the display module.

The backlight module is disposed inside the frame body and has alight-exit surface. A display panel is disposed on the frame body with adisplay surface facing away from the light-exit surface. The frame bodyhas a top portion at the side opposite to side of the metal sidewallconnecting to the bottom, wherein the display panel disposed on theframe body contacts with the top portion of the metal sidewall. Inaddition, the display panel includes a bottom surface and a side surfaceadjacent to the bottom surface, wherein the side surface of the displaypanel and the edge of the bottom surface stick out of the top portion.The area of the bottom surface of the display panel is greater than anopening of the frame body so that the frame body is completely withinthe projection area of the display panel.

The display panel and the frame body are together disposed on the backbezel, wherein at least a portion of the side surface of the displaypanel faces the inner surface of the sidewall, so that a second gapexist between the side surface and the inner surface of the sidewall.The second gap communicates with the first gap; both of the first gapand the second gap are provided for accommodating a glue. The width ofthe second gap is smaller than the width of the first gap. Furthermore,when the glue is provided, the glue fills the second gap and the firstgap and therefore secures the frame body on the back bezel.

Except being secured on the back bezel together with the display panel,the frame body may be secured independently on the back bezel. The baseplate of the back bezel includes at least a first positioning hole whilethe bottom of the frame body includes at least a second positioninghole. The first positioning hole and the second positioning hole areconfigured to position the frame body on the back bezel. Furthermore,the frame body can be secured on the back bezel by adhering, welding, orfastening.

The bottom of the frame body can be configured for securing of the framebody or accommodating the backlight module within the frame body. Thebottom includes a first bottom area and a second bottom area, whereinthe first bottom area rises in a direction away from the base plate toform a first space with the base plate; the second bottom area contactswith the base plate of the back bezel. The backlight module disposed inthe frame body is supported by the first bottom area and forms a secondspace with the second bottom area. In addition, a first bonding materialis further disposed in the first space to fix the bottom to the baseplate while a second bonding material is further disposed in the secondspace to fix the backlight module to the bottom.

The present invention provides a manufacturing method of the displaymodule, including the steps: disposing the frame body on the back bezeland forming the first gap between the metal sidewall of the frame bodyand the inner surface of the sidewall of the back bezel; providing theglue on the inner surface of the sidewall and above the first gap;disposing the display panel in the back bezel and enabling the edge ofthe bottom surface of the display panel to push and graze the glue;placing the display panel on the frame body, enabling the top portion ofthe metal sidewall to support the display panel, and forming the secondgap between the side surface of the display panel and the inner surfaceof the sidewall, wherein the glue fills the second gap.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A-1B show schematic views of the conventional display modules;

FIGS. 2A-2C are schematic views of the embodiment of the display moduleof the present invention;

FIGS. 3A-3B are schematic views of another embodiment of the displaymodule of the present invention;

FIGS. 4A-4B are schematic views of another embodiment of the displaymodule of the present invention;

FIG. 5 is a schematic view of another embodiment of the frame body ofthe present invention;

FIG. 6 is a schematic view of another embodiment of the display moduleof the present invention;

FIG. 7A is a flow chart of the embodiment of the manufacturing method ofthe display module of the present invention;

FIGS. 7B-7E are schematic views of the embodiment of the manufacturingmethod of the display module of the present invention;

FIG. 8 is a schematic view of strength test;

FIG. 9A shows the result of strength test of the display module of thepresent invention;

FIG. 9B shows the result of strength test of the conventional displaymodule;

FIGS. 10A-10B are schematic views of another strength test; and

FIG. 10C shows the result of the strength test shown in FIGS. 10A-10B ofthe display panel of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The display module 10 of the present invention includes a first housing100, a second housing 200, a backlight module 300, and a display panel400. As the embodiment shown in FIGS. 2A-2B, the first housing 100 canbe a back bezel; the second housing 200 can be a frame body. The backbezel 100 includes a base plate 110 and a sidewall 120 surrounding theperiphery of the base plate 110. The frame body 200 is disposed on theback bezel 100 and has a metal sidewall 250. The metal sidewall 250extends along an inner surface of the sidewall 120, wherein a first gap2500 exists between the metal sidewall 250 and the inner surface of thesidewall 120 for accommodating a portion of glue 60 (described later).The frame body 200 further includes a bottom 230. An outer surface ofthe bottom 230 faces the base plate 110 and is preferably connected withthe base plate 110, wherein the periphery of the bottom 230 issurrounded by the metal sidewall 250 as mentioned above. The bottom 230and the metal sidewall 250 can be integrally formed. That is, forexample, the frame body 200 may be an integrally formed stampingsheet-metal. On the other hand, the back bezel 100 can be made ofplastic or metal. However, in the preferred embodiment of the presentinvention, the back bezel 100 and the frame body 200 are both made ofmetal and constitute a slim frame of the display module 10. For example,the thickness of the sidewall made of plastic is between 0.35 and 0.4mm; however, the sidewall made of metal may be reduced to a thickness of0.15-0.2 mm. Consequently, the increased space inside the frame body 200of the present invention resulted from the slimmer frame margin improvesthe arrangement of a backlight module 300. That is, the backlight module300 can extend further outward. On the other hand, the distance “d”between the backlight module 300 and the display area 410correspondingly becomes larger, preventing the leakage of large anglelight.

The backlight module 300 of the display module 10 is disposed inside theframe body 200 and has a light-exit surface 310. A display panel 400 isdisposed on the frame body 200 in a manner that a display surface 401faces away from the light-exit surface 310. In addition, a light sourcemodule 500 is also disposed inside the frame body 200 and can be aside-emitting light source or a bottom-emitting light source. As FIG. 2Cshows, the light source module 500 of the present invention ispreferably located between the backlight module 300 and the metalsidewall 250. The light source module 500 preferably includes a lightbar 510 extending along the metal sidewall 250. The light bar 510includes a strip circuit board 530 and a plurality of light sources 520.The strip circuit board 530 may be, for example, a rigid board, aflexible board, or a metal substrate made of materials includingaluminum, copper, etc. The plurality of light sources 520 are disposedon the strip circuit board 530 and arranged along the extensiondirection of the strip circuit board 530. The light source module 500 ispreferably disposed at one side of the backlight module 300, instead ofaround the backlight module 300. Alternatively, the light source module500 can be disposed at two opposite sides of the backlight module 300.In addition, a shielding tape 550 is disposed on one side of the lightbar 510 facing the display panel 400 and covers a portion of the outersurface of the backlight module 300 facing the display panel 400 toreduce light leakage. In other embodiments, the width of the shieldingtap 550 is also large enough to cover the area from the top portion 251of the frame body 200 to the backlight module 300.

As mentioned above, the display panel 400 is disposed on the frame body200 in a manner that the display surface 401 faces away from thelight-exit surface 310. In the preferred embodiment of the presentinvention, the display panel 400 disposed on the frame body 200 contactswith the top portion 251 of the metal sidewall 250. The top portion 251is opposite to the side of the metal sidewall 250 connecting to thebottom 230 and has an upper surface parallel to the bottom 230, whereinthe display panel 400 contacts with the upper surface of the top portion251. In other embodiments, as in the case that the frame body 200 is anintegrally formed stamping sheet-metal, the thickness of the stampingsheet-metal is the thickness of the metal sidewall 250. That is, thethickness of the metal sidewall 250 is uniform and equal to the width ofthe top portion 251 (measured from a direction parallel to the directionof the thickness). In other embodiments, the top portion can be formedby bending the stamping sheet-metal (not shown). That is, the topportion 251 is at the side opposite to the side of the metal sidewallconnecting to the bottom and has a thickness equal to the thickness ofthe stamping sheet-metal, wherein a bending part is formed between thetop portion and the metal sidewall. In the circumstance, the size of theupper surface of the top portion is irrelevant to the thickness of themetal sidewall; that is, the extent of the bending determines the sizeof the upper surface of the top portion. The display panel 400 includesa bottom surface 420 and a side surface 430 adjacent to the bottomsurface 420, wherein the area of the bottom surface 420 is greater thanan opening of the frame body 200. Particularly, the longer side of thedisplay panel 400 is greater than the longer side of the frame body 200,and the shorter side of the display panel 400 is greater than theshorter side of the frame body 200. The bottom surface 420 of thedisplay panel 400 mentioned above is disposed opposite to the displaysurface 401 and faces the light-exit surface 310. In addition, the edgeportion of the bottom surface 420 of the display panel 400 preferablycontacts with the top portion 251 of the metal sidewall 250. Moreover,the side surface 430 of the display panel 400 and the edge of the bottomsurface 420 stick out of the top portion 251.

Furthermore, the display panel 400 and the frame body 200 are togetherdisposed on the back bezel 100, wherein at least a portion of the sidesurface 430 of the display panel 400 faces the inner surface of thesidewall 120, so that a second gap 4300 exists between the side surface430 and the inner surface of the sidewall 120. The second gap 4300communicates with the first gap 2500. Both of the first gap 2500 and thesecond gap 4300 are provided for accommodating the glue 60. On the otherhand, because the side surface 430 of the display panel 400 preferablysticks out of the top portion 251, the width of the second gap 4300 issmaller than the width of the first gap 2500.

In the present invention, the glue 60 is disposed between the sidewall120 and the side surface 430 of the display panel 400, and between thesidewall 120 and the metal sidewall 250. Specifically, the metalsidewall 250, the side surface 430 of the display panel 400, and theinner surface of the sidewall 120 form the communicating first gap 2500and the second gap 4300 when the glue 60 is not provided. When the glue60 is provided, the glue 60 fills the second gap 4300 and preferablyfurther fills the first gap 2500. The glue 60 may completely fill thefirst gap 2500 and the second gap 4300, or the glue 60 may partiallyfill the first gap 2500 and/or the second gap 4300. If only a portion ofthe first gap 2500 and a portion of the second gap 4300 have the glue 60filling therein, the remaining portions of the first gap 2500 and thesecond gap 4300 are blocked by the glue 60 and do not communicate witheach other. In addition, the filling glue 60 secures the display panel400 inside the back bezel 100 and on the frame body 200, furthersecuring the frame body 200 on the back bezel 100. The glue 60preferably has a light-resistant property and reduces the amount oflight passing therethrough.

On the other hand, the first gap 2500 formed by the metal sidewall 250adjacent to the light source module 500 and the inner surface of thesidewall 120 is preferably not filled with the glue 60. Similarly, thesecond gap 4300 at the same side with the first gap 2500 above is notfilled with the glue 60, either. In other words, the glue 60 filling inthe first gap 2500 formed by three sides of the metal sidewall 250 andthree sides of the sidewall 120, and the second gap 4300 formed by threesides of the side surface 430 and three sides of the sidewall 120 issubstantially in a U shape.

Except being secured on the back bezel 100 together with the displaypanel 400, the frame body 200 may be secured independently on the backbezel 100. In detail, the frame body 200 disposed on the back bezel 100is also well positioned relative to the sidewall 120. For example, theframe body 200 is positioned on the back bezel 100 so that the metalsidewall 250 of the frame body 200 and the sidewall 120 of the backbezel 100 can form a first gap 2500 with an adequate gap size. As FIG.2A shows, the base plate 110 of the back bezel 100 includes at least afirst positioning hole 1100; the bottom 230 of the frame body 200includes at least a second positioning hole 2300. The shape of the firstor second positioning holes can be circle or polygon while the number ofthe first positioning hole 1100 or the second positioning hole 2300 ispreferably two or more than two. Furthermore, the second positioninghole 2300 of the frame body 200, which is disposed on the back bezel100, is aligned to the first positioning hole 1100. In other words, thefirst positioning hole 1100 and the second positioning hole 2300 serveto position the frame body 200 on the back bezel 100 when disposing theframe body 200. Specifically, when the number of the first positioninghole 1100 and the second positioning hole 2300 is two, each secondpositioning hole 2300 is preferably aligned to the corresponding firstpositioning hole 1100, so that the position and the direction of theframe body 200 relative to the back bezel 100 can be determined. In theembodiment where the shape of the first and second positioning holes ispolygon and the number of the first and second positioning holes is one,the frame body 200 can still be positioned relative to the back bezel100 by aligning the corresponding sides and angles of the polygons.Furthermore, the frame body 200 can be secured on the back bezel by anysuitable method such as adhering, welding, or fastening.

In the embodiments shown in FIGS. 2A-2B, the bottom 230 of the framebody 200 has a plane surface and is secured on the base plate 110 of theback bezel 100 by welding such as spot welding or ultrasonic welding, oradhering with an adhering material 63 such as using a double sidedadhesive tape. Furthermore, in other embodiments, the bottom 230 canhave a different configuration for securing of the frame body 200 oraccommodating the back light module 300 within the frame body 200. Asthe embodiments shown in FIGS. 3A-3B, the bottom 230 includes a firstbottom area 231 and a second bottom area 232, wherein the first bottomarea 231 rises in a direction away from the base plate 110 to form afirst space 233 with the base plate 110. The second bottom area 232surrounds the first bottom area 231 and is adjacent to the metalsidewall 250, wherein the second bottom area 232 contacts with the baseplate 110 of the back bezel 100. An inner surface of the first bottomarea 231 is preferably a flat surface and is parallel to the base plate110. The backlight module 300 disposed within the frame body 200 issteadily supported by the first bottom area 231 and forms a second space234 with the second bottom area 232. In addition, as the embodimentshown in FIG. 3B, a first bonding material 61 is further disposed in thefirst space 233 to fix the bottom 230 to the base plate 110; a secondbonding material 62 is further disposed in the second space 234 to fixthe backlight module 300 to the bottom 230. Compared with the frame bodyhaving no rising area, the embodiment shown in FIG. 3A-3B, which usesthe frame body 200 having the rising area, takes advantage of the spacebetween the back bezel 100 and the frame body 200 by means of the designof the rising bottom 230, the first space 233, and the second space 234in order to reduce the thickness of the display module 10. For example,the design of rising bottom 230 reduces the thickness of the bottom sideof the display module 10; in other ways, the backlight module 300 can befurther supported steadily by the first bottom area 231 as being fixedto the bottom 230 of the frame body 200 by the second bonding material62.

The configuration of the bottom 230 of the frame body 200 mentionedabove, namely the uneven/ups and downs configuration of the first bottomarea 231 and the second bottom area 232 provides the enhanced structuralstrength. In addition, the arrangement of the first bottom area 231 andthe second bottom area 232 is not limited to the above-mentionedembodiment. As the embodiment shown in FIG. 4A-4B, it is the firstbottom area 231 surrounding the second bottom area 232 and adjacent tothe metal sidewall 250. As the embodiment shown in FIG. 5, the firstbottom area 231 and the second bottom area 232 are both in strip shapeand alternately distributed to form a corrugated bottom 230.Furthermore, as shown in FIGS. 3A, 4A, and 5, since the first bottomarea 231 is formed as a shallow trough on the side facing the base plate110 while the second bottom area 232 is formed as a shallow trough onthe side facing the inner side of the frame body 200, the bondingmaterial can be well disposed in these shallow troughs.

In other embodiments, as shown in FIG. 6, the frame body 200 is securedon the back bezel 100 by means of engagement mechanism of the metalsidewall 250 and the sidewall 120. Specifically, an engaging element 71such as a hook is disposed on the metal sidewall 250 of the frame body200. After positioning the frame body 200 on the back bezel 100, theengaging element 71 is engaged with an engaging portion 72 on thesidewall 120, such as a gap, to secure the frame body 200 to the backbezel 100 at a preferred position. Alternatively, the engaging element71 can be disposed on the sidewall 120 while the engaging portion 72 isdisposed on the metal sidewall 250. The engaging element 71 may extendacross the first gap 2500 and reach the engaging portion 72. However,the engaging element 71 and the engaging portion 72 are preferably awayfrom the upper portion of the first gap 2500, namely away from theportion of the first gap 2500 close to the second gap 4300.Consequently, even the engaging element 71 reduces the space of thefirst gap 2500 for receiving the glue 60, the first gap 2500 stillprovides enough space for receiving the glue 60.

The preferred manufacturing method of the display module of the presentinvention will be described below. As FIGS. 7A-7B and 3A show, a step810 includes disposing the frame body 200 on the back bezel 100 to formthe first gap between the metal sidewall 250 of the frame body 200 andthe inner surface of the sidewall 120, wherein disposing the frame body200 on the back bezel 100 specifically includes positioning the framebody 200 at a predetermined position on the back bezel 100 and thensecuring the frame body 200 and the back bezel 100 to each other. Thestep of positioning the frame body 200 is preferably performed byaligning the second positioning hole 2300 on the bottom 230 of the framebody 200 to the first positioning hole 1100 on the base plate 110 of theback bezel 100. The position of the second positioning hole on thebottom 230 determines the width of the first gap 2500 around the framebody 200, wherein the first gap 2500 preferably has a uniform width atleast on opposite sides of the display module 10. In addition, duringperforming the positioning step, a bolt, a pin, or other means which canpass through the first positioning hole 1100 and the second positioninghole 2300 is provided for positioning. The way of securing the framebody 200 on the back bezel 100 includes securing the bottom 230 of theframe body 200 to the base plate 110 of the back bezel 100 by weldingsuch as spot welding or ultrasonic welding, or adhering with an adheringmaterial. Alternatively, the metal sidewall 250 of the frame body 200can be secured to the sidewall 120 of the back bezel 100 by engagementmechanism, i.e. engaging the engaging element 71 disposed on the metalsidewall 250 with the engaging portion 72 on the sidewall 120 (pleaserefer to FIG. 6).

The step 810 further includes disposing the light source module 500 andthe backlight module 300 inside the frame body 200, which has beendisposed on the back bezel 100. As FIGS. 7A and 7C show, a step 820includes providing the glue 60 on the inner surface of the sidewall 120and above the first gap 2500. Specifically, as shown in FIG. 7C, it ispreferably to use an XYZ robot and a glue dispenser 90 to provide theglue 60 on the inner surface of the sidewall 120 and above the first gap2500 along the sidewall 120, wherein the glue may be, for example, roomtemperature vulcanizing (RTV) silicone. A nozzle 901 of the gluedispenser 90 dispenses the glue along the sidewall 120 at intervals, ormoves along the inner side of the sidewall 120 at a constant speed andsimultaneously dispenses equal amount of glue 60 on the moving route. Inthe preferred embodiment, in addition to determining and estimating theamount of the glue 60 by experiment, the height of the glue should besmaller than or equal to the width of the first gap 2500. For example,the width of the first gap 2500 is 0.3 mm while the height of the glue60 is smaller than or equal to 0.3 mm. Furthermore, in the preferredembodiment, as the glue dispenser 90 dispenses the glue 60 with adischarge pressure of 0.35 Mpa and the XYZ robot moves the nozzle 901 atthe speed of 40 mm/s, a preferable amount of glue can be provided on theinner side of the sidewall 120. In other embodiments, the dischargepressure and the moving speed can be adjusted depending on the size ofthe nozzle. In addition, glue viscosity makes the glue 60 more easily tostay on the inner side of the sidewall 120 and maintain its height.

As FIGS. 7A and 7D show, the step 830 includes disposing the displaypanel 400 in the back bezel 100 and enabling the edge of the bottomsurface 420 of the display panel 400 to push and pass the glue 60. Inthe step 830, a robot arm moves the display panel 400 to be above theframe body 200 and then to move toward the frame body 200 in a mannerthat the display panel 400 is parallel to the bottom 230 of the framebody 200. In addition, the display panel 400 above the frame body 200 isin a condition that the frame body 200 is totally within the projectionarea of the display panel 400. After the display panel 400 moves to adegree of starting to enter the accommodation space of the back bezel100 with the side surface 430 facing the sidewall 120, the display panel400 will have the edge of its bottom surface 420 pushing and grazing theglue 60 on the inner surface of the sidewall 120, so that part of theglue 60 flows down into the first gap 2500. Accordingly, the sidesurface 430 of the display panel 400 subsequently gets some glue 60. Theglue 60 flowing down into the first gap 2500 is in an amount of fillingthe first gap 2500 rather than merely flow along the inner side of thesidewall 120. Furthermore, the height of the glue 60 on the sidewall 120(namely smaller than or equal to the width of the first gap 2500)enables the edge of the bottom surface 420 of the display panel 400 notto push the glue 60 into the frame body 200 to further flow to thebacklight module 300 disposed therein. The glue 60 can totally fill thefirst gap 2500 or fill a portion of the first gap 2500 near theglue-providing position. For example, in the step 820, if the glue 60 isprovided with the discharge pressure of 0.35 Mpa and the nozzle speed of40 mm/s, the glue 60 will appropriately flow and fill the first gap 2500as mentioned above.

As FIGS. 7A and 7E show, the step 840 includes placing the display panel400 on the frame body 200, enabling the top portion 251 of the metalsidewall 250 to support the display panel 400 at the bottom surface 430,and forming the second gap 4300 between the side surface 430 of thedisplay panel 400 and the inner surface of the sidewall 120, wherein theglue 60 fills the second gap 4300. In the step 840, the display panel400 with its side surface 430 getting some glue 60 moves to a degreethat the bottom surface 420 is supported by the metal sidewall 250 onthe top portion 251 and then stops. Meanwhile, the second gap 4300having the glue 60 filling therein is formed between the side surface430 and the inner surface of the sidewall 120. In addition, because thatthe second gap 4300 is above the first gap 2500 and has a smaller widththan the first gap 2500, the glue 60 continuously flows into the firstgap 2500 and fills therein when the second gap 4300 is formed.

In the preferred embodiment of the present invention, the display module10 composed of double metal housings of the back bezel 100 and the framebody 200 is formed by the steps 810-840, wherein the display panel 400is secured to the double metal housings composed of the back bezel 100and the frame body 200 by the glue 60. In a strength simulation, such asthe four points bending simulation shown in FIG. 8, two parallel supportspans 91 are under the display module 10, spaced apart and respectivelyclose to the opposite sides of the edge of the display module 10,wherein the support spans 91 have equal distances from their closersides of the edge, respectively. Two load spans 92 parallel to thesupport spans 91 are disposed on the display panel 10 and spaced apart.Particularly, the load spans 92 are respectively disposed between thecenter and the edge of the display module 10 on opposite sides, and haveequal distances from their closer sides of the edge, respectively. Theload spans 92 exerts force on the display module 10. As FIG. 9A shows,when the force is over 68.92 N, the display glass of the display module10 will deform or crack. On the other hand, the display glass of theconventional display panel 1 in the four points bending simulationbecomes deformed or cracked when the force reaches 60.94 N.Consequently, the structural strength of the display module 10 is 1.15times stronger than that of the conventional display module 1.

In other strength tests such as the static push test, the results isalso positive. As FIGS. 10A-10B show, the display module 10 is supportedby a fixture 95 in the static push test. The static push device 96gradually exerts force on the display panel 400 by contacting againstthe display panel 400 with a pressing head 97. In the average force of133.86 N, the display glass cracks, wherein the exerted force is greaterthan the minimum requirement in the test. In other words, the crack ofthe display glass of the display panel 400 of the present invention willoccur only when the force exerted on the display module 10 is more than100 N. In addition, as FIG. 10C shows, from the observation of thedisplay glass after the static push test, no crack appears at the framemargin of the display module. That is, the cracks are caused by thepressing head 97 pressing against the central part of the display glass,not resulted from the supporting of the metal sidewall 250.

Although the preferred embodiments of present invention have beendescribed herein, the above description is merely illustrative. Thepreferred embodiments disclosed will not limited the scope of thepresent invention. Further modification of the invention hereindisclosed will occur to those skilled in the respective arts and allsuch modifications are deemed to be within the scope of the invention asdefined by the appended claims.

What is claimed is:
 1. A manufacturing method of a display module,comprising: disposing a second housing on a first housing to form afirst gap between a metal sidewall of the second housing and an innersurface of a sidewall of the first housing; providing a glue on theinner surface of the sidewall and above the first gap; disposing adisplay panel in the first housing and enabling an edge of a bottomsurface of the display panel to push and graze the glue; and placing thedisplay panel on the second housing, enabling a top portion of the metalsidewall to support the display panel at the bottom surface, and forminga second gap between a side surface of the display panel and the innersurface of the sidewall, wherein the glue fills the second gap.
 2. Themanufacturing method of the display module of claim 1, wherein the stepof disposing the second housing on the first housing further includesaligning a second positioning hole of the bottom of the second housingto a first positioning hole of a base plate of the first housing.
 3. Themanufacturing method of the display module of claim 1, wherein the stepof disposing the second housing on the first housing further includesfixing the bottom to a base plate of the first housing.
 4. Themanufacturing method of the display module of claim 1, wherein the stepof disposing the second housing on the first housing further includesconnecting the metal sidewall to the sidewall.
 5. The manufacturingmethod of the display module of claim 1, wherein the step of providingthe glue on the inner surface of the sidewall further comprises makingthe height of the glue on the sidewall be less than or equal to thewidth of the first gap.
 6. The manufacturing method of the displaymodule of claim 1, wherein the step of the glue filling the second gapfurther comprises the first gap accommodating a portion of the glueexceeding from the second gap.